so i got a jeep and a problem. i bought an 87 yj 2.5 for 2200 and it ran fine for 3 months than it crapped out. the compression is bad and my mechanic says he might have to do the piston rings and my injector is bad so that needs to be replaced too. he also replaced my spark plugs and my crank sensor. so far he wants $300 for the plugs and crank sensor and he said if its the rings and the injector its going to be more. he said in total its going to be "less than a grand" am i being screwed over? he is my friends dad and is supposed to be giving me the "special price" am i being screwed?